Electrical device and plug for an electrical device

Abstract

Known pumping devices have a connection lid, a connection cap slipped over the connection lid, a hollow chamber formed between the connection lid and the connection cap, and electrical connections that extend through the connection cap into the hollow chamber. It is disadvantageous that when fuels containing water are being pumped, such as ethanol, corrosion can occur at the electrical connections and at the uninsulated cable segments that are exposed to fuel near the electrical connections, for instance at the electrical coils or flexible cables of the carbon brushes, and in the final analysis this leads to an interruption in the electrical contact and thus to failure of the pumping device. In the electrical device of the invention, corrosion of the electrical connections and of the electrical components adjoining them upstream and downstream is avoided entirely or at least greatly diminished. According to the invention, the electrical connections are each provided in separate chambers of the hollow chamber.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application is based on German Patent Application No. 10 2007 052 747.2 filed on Nov. 6, 2007, upon which priority is claimed.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The invention is based on an electrical device and a plug for an electrical device.[0004]2. Description of the Prior Art[0005]A pumping device is already known from U.S. Pat. No. 5,762,481, having a connection lid, a connection cap slipped over the connection lid, a hollow chamber formed between the connection lid and the connection cap, and electrical connections that extend through the connection cap into the hollow chamber. It is disadvantageous that when fuels containing water, such as ethanol, are being pumped, corrosion can occur at the electrical connections and at the uninsulated cable segments that are exposed to fuel near the electrical connections, for instance at the electrical coils or flexible cables of the carbon brushes, and in the...

AI Technical Summary

Benefits of technology

[0010]It is also advantageous if the partition extends from a bottom of the connection cap to a bottom of the connection lid and / or from a bottom of the connection lid to a bottom of the connection cap, since the division of the hollow chamber into separate chambers can be attained very simply in this way.

[0011]It is very advantageous if a seal for sealing off the at least one partition is provided on the bottom of the connection lid and / or on the bottom of the connection cap, since in this way, a very simple, economical sealing of the separate chambers is achieved. In an advantageous embodiment, the seal together with the partition form a gap seal.

[0012]It is also advantageous if electrical components are provided in each of the two separate chambers, since these are likewise protected against corrosion by the partition or partitions according to the invention. For example, the electrical components are electrical coils, flexible cables, and / or carbon brushes.

[0013]It is further advantageous if the connection cap, on the outside facing away from the hollow chamber, has a plug receptacle for a connection plug, into which the electrical connections protrude, and the plug receptacle has two through openings, discharging into the hollow chamber, for the electrical connections, and between the two through openings, a sealing groove cooperating with the connection plug is provided. In this way, the electrical connections of the electrical device are protected against corrosion outside the hollow chamber as well, as are the plug connections of the connection plug.

[0014]The electric plug according to the invention has the advantage over the prior art that corrosion of electrical or electrically conductive components on the plug and on the electrical device is avoided entirely or at least greatly diminished, because the plug wall protrudes in the insertion direction and / or laterally.

[0015]It is especially advantageous if the plug connections are embodied in tonglike fashion, since in this way, strong connection forces are achieved along with a very good electrical contact that makes very high current consumption possible. Moreover, this embodiment requires only very little space.

Problems solved by technology

It is disadvantageous that when fuels containing water, such as ethanol, are being pumped, corrosion can occur at the electrical connections and at the uninsulated cable segments that are exposed to fuel near the electrical connections, for instance at the electrical coils or flexible cables of the carbon brushes, and in the final analysis this leads to an interruption in the electrical contact and thus to failure of the pumping device.

It is disadvantageous that this version is comparatively expensive to manufacture.

Moreover, corrosion continues to occur at the flexible cables.

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